Consolidated statements of comprehensive (loss) income (USD $) In Thousands, unless otherwise specified	3 Months Ended		6 Months Ended
	Jun. 30, 2014	Jun. 30, 2013	Jun. 30, 2014	Jun. 30, 2013
Comprehensive income (loss)
Net (loss) income	$ (8,433)	$ 38,900	$ (4,028)	$ 37,710
Other comprehensive loss
Reclassification adjustment for hedge gains included in gain from oil hedging activities in the consolidated statements of operations	0	(9,509)	0	(19,512)
Income tax benefit related to other comprehensive loss	0	3,642	0	7,460
Other comprehensive loss, net of tax	0	(5,867)	0	(12,052)
Comprehensive (loss) income	$ (8,433)	$ 33,033	$ (4,028)	$ 25,658